CN104557421A - Triple-effect toluene recovery technology - Google Patents
Triple-effect toluene recovery technology Download PDFInfo
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- CN104557421A CN104557421A CN201310486454.XA CN201310486454A CN104557421A CN 104557421 A CN104557421 A CN 104557421A CN 201310486454 A CN201310486454 A CN 201310486454A CN 104557421 A CN104557421 A CN 104557421A
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- vaporizer
- toluene
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- concentrate pump
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
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Abstract
A triple-effect toluene recovery technology adopts a device comprising three vertical tube bundle evaporators (1,2 and 3), a vertical tube bundle condenser (4), a separation and collection tank (5), four transfer pumps (6, 7, 8 and 9) and a vacuum system, wherein crude toluene is subjected to three-stage evaporation of three evaporators, obtained toluene steam is condensed by the condenser and is collected, and toluene steam produced by the first evaporator and the second evaporator are used for heating gas of the second evaporator and the third evaporator. The third evaporator is added on the basis of the traditional double-effect recovery process and is matched with corresponding concentrating and conveying devices, so that the recovery treatment capacity of equipment is improved by about 50%; multi-stage recovery is adopted, and the obtained toluene is high in purity and stable in quality; and heat energy of the toluene steam generated by the first evaporator and the second evaporator is used sufficiently, energy saving and emission reduction are realized, and the energy consumption of the recovery process is 70% of that of the double-effect toluene recovery process.
Description
Technical field
The present invention relates to a kind of purification recovery technology of toluene solvant, a kind of triple effect toluene recovery technology.
Background technology
Manufacture industry in chemical industry and other, toluene is a kind of very conventional solvent, because its flash-point is low, volatile and have certain toxicity, can pollutes, therefore need to reclaim after discharge to air.And traditional recovery technology can only accomplish economic benefits and social benefits, heat utilization ratio is low, and cost is high, does not meet the requirement of current international and domestic industry energy-saving and emission-reduction, reclaiming energy consumption, reducing production cost in the urgent need to reducing.
Summary of the invention
The present invention is intended to propose a kind of higher toluene recovery method of heat utilization ratio, a kind of triple effect toluene recovery technology.
This triple effect toluene recovery technology uses the device of three vertical array tubular vaporizers, a vertical array tubular condenser, separated and collected tank, a four transferpumps and a set of vacuum system composition, wherein three vertical array tubular vaporizers are: the first vaporizer, the second vaporizer, the 3rd vaporizer, and four transferpumps are: the first concentrate pump, the second concentrate pump, the 3rd concentrate pump and smart toluene pump; This triple effect toluene recovery technology comprises the steps:
(1) order needs the crude cresylic acid reclaimed to enter the tube side of the 3rd vaporizer, toluene vapor is out made in the tube side of the second vaporizer to enter the shell side of the 3rd vaporizer, crude cresylic acid in the tube side of the 3rd vaporizer is heated, evaporate the toluene vapor obtained to be extracted after vertical array tubular condenser condenses by vacuum system, enter separated and collected tank, described vacuum system carries out vacuum suction to separated and collected tank;
(2) the toluene liquid after the 3rd vaporizer primary evaporator concentrates is transported in the tube side of the second vaporizer by the 3rd concentrate pump, simultaneously, the tube side of the first vaporizer toluene vapor is out made to enter the shell side of the second vaporizer, heating evaporation is carried out to the toluene liquid of initial concentration in the second vaporizer tube side, after the toluene that in the tube side of the second vaporizer and the tube side of the 3rd vaporizer, condensation obtains enters into vertical array tubular condenser, then enter separated and collected tank;
(3) the toluene liquid concentrated further through the second vaporizer is transported in the tube side of the first vaporizer by the second concentrate pump, the steam passing into 0.5 ~ 0.8MPa in the shell side of the first vaporizer heats, solidifying water is discharged through drain valve, gets to Hou Dao carry out raffinate process through the raffinate that the first vaporizer is concentrated by the first concentrate pump.
The present invention adds the 3rd vaporizer on traditional economic benefits and social benefits recovery process basis, and supporting corresponding concentrated e Foerderanlage, the recycling ability of equipment is improved greatly, about 50% can be improved; Owing to adopting multistage recovery, the toluene purity obtained is high, steady quality; Further, take full advantage of the heat of the toluene vapor that first, second vaporizer produces, energy-saving and emission-reduction, this recovery process energy consumption is 70% of economic benefits and social benefits toluene recovery technique.
Accompanying drawing explanation
Accompanying drawing is the schematic diagram of this triple effect toluene recovery technology.
Embodiment
As shown in the figure, this triple effect toluene recovery technology uses the device that three vertical array tubular vaporizers, vertical array tubular condenser 4, separated and collected tank, 5, four transferpumps and a set of vacuum system form.Wherein three vertical array tubular vaporizers are: the first vaporizer 1, second vaporizer 2, the 3rd vaporizer 3; Four transferpumps are: the first concentrate pump 6, second concentrate pump 7, the 3rd concentrate pump 8, smart toluene pump 9.
As shown in the figure, these equipment connection methods are: the shell side import of the first vaporizer 1 is heating steam import, the tube side import of the first vaporizer is connected with the outlet of the second concentrate pump 7, the liquid exit of the tube side of the first vaporizer is connected with the import of the first concentrate pump 6, and the pneumatic outlet of the tube side of the first vaporizer is connected with the shell side import of the second vaporizer 2.The shell-side outlet of the second vaporizer 2 is connected with the shell side import of vertical array tubular condenser 4, the tube side import of the second vaporizer is connected with the outlet of the 3rd concentrate pump 8, the liquid exit of the tube side of the second vaporizer is connected with the import of the second concentrate pump 7, and the pneumatic outlet of the tube side of the second vaporizer 2 is connected with the shell side import of the 3rd vaporizer 3.The shell-side outlet of the 3rd vaporizer 3 is connected with the shell side import of vertical array tubular condenser 4, the tube side import of the 3rd vaporizer is crude cresylic acid import, the liquid exit of the tube side of the 3rd vaporizer is connected with the import of the 3rd concentrate pump 8, and the pneumatic outlet of the tube side of the 3rd vaporizer is connected with the shell side import of vertical array tubular condenser 4.The shell-side outlet of vertical array tubular condenser 4 is connected with the import of separated and collected tank 5, and the liquid exit of separated and collected tank is connected with the import of smart toluene pump 9.Separated and collected tank 5 there is a vacuum orifice, be connected with vacuum system.
This triple effect toluene recovery technology comprises the steps:
(1) crude cresylic acid reclaimed is needed to enter the tube side of the 3rd vaporizer 3, in the tube side of the second vaporizer 2, toluene vapor (about 100 DEG C) out enters the shell side of the 3rd vaporizer 3, crude cresylic acid in the tube side of the 3rd vaporizer is heated, evaporate the toluene vapor obtained to be extracted after vertical array tubular condenser 4 condensation by vacuum system, enter separated and collected tank 5, vacuum system carries out vacuum suction to separated and collected tank 5;
(2) the toluene liquid after the 3rd vaporizer 3 primary evaporator concentrate is transported in the tube side of the second vaporizer 2 by the 3rd concentrate pump 8, simultaneously, the tube side toluene vapor out (about 110 DEG C) of the first vaporizer 1 enters the shell side of the second vaporizer 2, heating evaporation is carried out to the toluene liquid of initial concentration in the second vaporizer tube side, after the toluene that in the tube side of the second vaporizer 2 and the tube side of the 3rd vaporizer 3, condensation obtains enters into vertical array tubular condenser 4, then enter separated and collected tank 5; The smart toluene collected in separated and collected tank is transferred out by smart toluene pump 9.
(3) be transported in the tube side of the first vaporizer 1 through the toluene that the second vaporizer 2 is concentrated further by the second concentrate pump 7, the steam passing into 0.5 ~ 0.8MPa in the shell side of the first vaporizer heats, the solidifying water of steam is discharged through drain valve, gets to Hou Dao carry out raffinate process through the raffinate that the first vaporizer is concentrated by the first concentrate pump 6.
In this triple effect toluene recovery technology, first vaporizer 1 can control the discharging speed of the first concentrate pump 6 by high viscosity pressure reduction liquid level sensor, second vaporizer 2 controls the discharging speed of the second concentrate pump 7 by high viscosity pressure reduction liquid level sensor, 3rd vaporizer 3 controls the discharging speed of the 3rd concentrate pump 8 by high viscosity pressure reduction liquid level sensor, the inlet amount of crude cresylic acid sets according to need of production, first vaporizer 1 controls the aperture of steam pneumavalve by temperature sensor, control the inlet of steam, thus control the balance of whole evaporation, and ensure further the concentration of the toluene raffinate that the first vaporizer 1 exports through the first concentrate pump, the solidifying water that the crude cresylic acid entering the 3rd vaporizer 3 also can use the first vaporizer 1 to discharge in advance preheats.
Triple effect toluene recovery technology of the present invention has following characteristics compared with traditional technology:
1, the equipment of same area, recycling ability improves greatly, improves about 50%.
2, multistage recovery, toluene purity is high, steady quality.
3, make full use of the energy, energy-saving and emission-reduction, this retrieving arrangement energy consumption is 70% of economic benefits and social benefits toluene recovery device, more low-carbon environment-friendly.
In triple effect toluene recovery technology of the present invention, the reference data of the specification of each equipment is:
Vertical array tubular vaporizer: 350 squares,
Vertical array tubular condenser: 400 squares,
Separated and collected tank: 2 cubes,
Transferpump: 50 cubic meters/hour,
Vacuum system: 3 cubic meters/hour ,-0.1Mpa.
Processing parameter during operation is:
Crude cresylic acid squeezes into speed: 10-50 cubic meter/hour,
Discharge velocity: 3-20 cubic meter/hour,
Quantity of steam: 1.5-4.0 ton/hour,
Recirculated water: 200-400 cubic meter/hour.
Claims (2)
1. a triple effect toluene recovery technology, use the device that three vertical array tubular vaporizers, a vertical array tubular condenser (4), a separated and collected tank (5), four transferpumps and a set of vacuum system form, wherein three vertical array tubular vaporizers are: the first vaporizer (1), the second vaporizer (2), the 3rd vaporizer (3), and four transferpumps are: the first concentrate pump (6), the second concentrate pump (7), the 3rd concentrate pump (8) and smart toluene pump (9); It is characterized in that this triple effect toluene recovery technology comprises the steps:
(1) order needs the crude cresylic acid reclaimed to enter the tube side of the 3rd vaporizer (3), toluene vapor is out made in the tube side of the second vaporizer (2) to enter the shell side of the 3rd vaporizer (3), crude cresylic acid in the tube side of the 3rd vaporizer is heated, evaporate the toluene vapor obtained to be extracted after vertical array tubular condenser (4) condensation by vacuum system, enter separated and collected tank (5), described vacuum system carries out vacuum suction to separated and collected tank (5);
(2) the toluene liquid after the 3rd vaporizer (3) pre-evaporation concentrates is transported in the tube side of the second vaporizer (2) by the 3rd concentrate pump (8), simultaneously, the tube side toluene vapor out of the first vaporizer (1) is made to enter the shell side of the second vaporizer (2), heating evaporation is carried out to the toluene liquid of initial concentration in the second vaporizer tube side, after the toluene that in the tube side of the second vaporizer (2) and the tube side of the 3rd vaporizer (3), condensation obtains enters into vertical array tubular condenser (4), then enter separated and collected tank (5);
(3) be transported in the tube side of the first vaporizer (1) through the toluene liquid that the second vaporizer (2) is concentrated further by the second concentrate pump (7), the steam passing into 0.5 ~ 0.8MPa in the shell side of the first vaporizer heats, solidifying water is discharged through drain valve, gets to Hou Dao carry out raffinate process through the raffinate that the first vaporizer is concentrated by the first concentrate pump (6).
2. triple effect toluene recovery technology as claimed in claim 1, it is characterized in that: the first vaporizer (1) controls the discharging speed of the first concentrate pump (6) by high viscosity pressure reduction liquid level sensor, second vaporizer (2) controls the discharging speed of the second concentrate pump (7) by high viscosity pressure reduction liquid level sensor, 3rd vaporizer (3) controls the discharging speed of the 3rd concentrate pump (8) by high viscosity pressure reduction liquid level sensor, the inlet amount of crude cresylic acid sets according to need of production, first vaporizer (1) controls the aperture of steam pneumavalve by temperature sensor, control the inlet of steam, thus control the balance of whole evaporation, and ensure further the concentration of the toluene raffinate that the first vaporizer (1) exports through the first concentrate pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310486454.XA CN104557421B (en) | 2013-10-16 | 2013-10-16 | Triple effect toluene recovery technology |
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| CN201310486454.XA CN104557421B (en) | 2013-10-16 | 2013-10-16 | Triple effect toluene recovery technology |
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| CN104557421A true CN104557421A (en) | 2015-04-29 |
| CN104557421B CN104557421B (en) | 2016-05-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107596715A (en) * | 2017-11-06 | 2018-01-19 | 李少艳 | A kind of connection in series-parallel multiple-effect condensation technology |
| CN108083965A (en) * | 2017-12-06 | 2018-05-29 | 启东久星化工有限公司 | A kind of recycling technique of toluene |
| CN108579115A (en) * | 2018-05-04 | 2018-09-28 | 绵阳科大久创科技有限公司 | A kind of negative pressure evaporation rectifying combination separator |
| CN109776251A (en) * | 2019-03-15 | 2019-05-21 | 烟台东洁环保机械工程有限公司 | Toluene quadruple effect recovery process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0082702A1 (en) * | 1981-12-23 | 1983-06-29 | Mobil Oil Corporation | Conversion of Fischer-Tropsch synthesis products to benzene, xylene and toluene |
| CN102824751A (en) * | 2012-08-31 | 2012-12-19 | 烟台东洁环保机械工程有限公司 | Distillation separation and recovery method for toluene-polyethylene mixed solution and used equipment |
| CN102886150A (en) * | 2012-09-20 | 2013-01-23 | 烟台东洁环保机械工程有限公司 | Double-effect evaporation method for crude toluene mixed solution and device using double-effect evaporation method |
| CN103007565A (en) * | 2013-01-11 | 2013-04-03 | 张瑞烟 | Method and device for triple-effect separation of methylbenzene and polyethylene |
-
2013
- 2013-10-16 CN CN201310486454.XA patent/CN104557421B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0082702A1 (en) * | 1981-12-23 | 1983-06-29 | Mobil Oil Corporation | Conversion of Fischer-Tropsch synthesis products to benzene, xylene and toluene |
| CN102824751A (en) * | 2012-08-31 | 2012-12-19 | 烟台东洁环保机械工程有限公司 | Distillation separation and recovery method for toluene-polyethylene mixed solution and used equipment |
| CN102886150A (en) * | 2012-09-20 | 2013-01-23 | 烟台东洁环保机械工程有限公司 | Double-effect evaporation method for crude toluene mixed solution and device using double-effect evaporation method |
| CN103007565A (en) * | 2013-01-11 | 2013-04-03 | 张瑞烟 | Method and device for triple-effect separation of methylbenzene and polyethylene |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107596715A (en) * | 2017-11-06 | 2018-01-19 | 李少艳 | A kind of connection in series-parallel multiple-effect condensation technology |
| CN107596715B (en) * | 2017-11-06 | 2021-06-01 | 李少艳 | Series-parallel connection multiple-effect concentration process |
| CN108083965A (en) * | 2017-12-06 | 2018-05-29 | 启东久星化工有限公司 | A kind of recycling technique of toluene |
| CN108579115A (en) * | 2018-05-04 | 2018-09-28 | 绵阳科大久创科技有限公司 | A kind of negative pressure evaporation rectifying combination separator |
| CN109776251A (en) * | 2019-03-15 | 2019-05-21 | 烟台东洁环保机械工程有限公司 | Toluene quadruple effect recovery process |
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| CN104557421B (en) | 2016-05-18 |
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Effective date of registration: 20161009 Address after: 314003 Jiaxing Economic Development Zone, Zhejiang Ping Road, No. 777 Patentee after: Hexin Kuraray Microfibric Leather (Jiaxing) Co., Ltd. Patentee after: Tobacco Taidongjie Environmental Mechine Engineering Co., Ltd. Patentee after: ZHEJIANG HEXIN NEW MATERIAL CO., LTD. Address before: 314003 Jiaxing Economic Development Zone, Zhejiang Ping Road, No. 777 Patentee before: Hexin Kuraray Microfibric Leather (Jiaxing) Co., Ltd. Patentee before: Tobacco Taidongjie Environmental Mechine Engineering Co., Ltd. Patentee before: Zhejiang Hexin Industry Group Co., Ltd. |